Superheater.



No. 883,871. PATBNTED APR. 71908.

E. Hf FOSTER. g

SUPERHEATER. APPLIOATION FILED DBO. a, 1904.

2 SHEETS-SHEET 2.

8 l Y 351:; /i/v" @forumup UNITED sTATEs PATENT oEE-rcE- ERNEST H. FOSTER, OF NEW YORK, N. Y.

SUIPERHEATER.

Specification of Letters Patent.

Patented April 7, 1908.

Application led December 6, 1904. Serial No. 235,670.

To all whom it may concern: Be it known that I, ERNEST H. FOSTER, a citizen of the United States, residing at New York,`in.the county of R-ichmond andState `drum and connected4 therewith through water legs or headers.

Another object is to provide a superheater which may be readily removed without disturbing the water tube connections of the boiler.

A further object is to provide for effective bafiiing of the hot gases from the boiler furnace, so as to utilize the heat thereof in an eicient manner for the water tubes and the superheater.

In carrying out my invention to secure' to one side of the same, and occupies space which would otherwise be. occupied -by several of the water tubes. The connections of the headers with .the steam drum and service pipe are readily detachable, so that the superheater, being at the side of the drum,

and t ere being no Water tubes above the superheater, may be lifted bodily out of the boller casing.

In thev accompanying drawing I have shown the preferred embodiment'm a more. or less diagrammatic way, but clearly showing all the novel features of the invention as I refer to constructand arran e them.

igure 1 is a side elevation o a boiler and superheater with ythe Iside oftheboiler and rnace casin removed toshow the various parts inside't e same. 2 is a cross section on line II-.I I,1ofFig. 1.

A indicates the steam drum of the boiler, from which depend front and rear headers or Water-legs.B,-C. Between thelatterare watertubes, indicated by D. vThe whole is supported, usually in an inclined osition as invention to such va boiler I omit a number of tubes from an upper corner; of the header and in the space or pocket thus obtained I locate the superheater. This latter consists, in its preferred form, of a number of tubes so arranged' as to be connected at one end to vertical headers H, I, as shown in Fig. 2. Attheir other end they are connected in horizontal pairs to return couplings, i'ndicated by J, Fig. 1. One of-the headers, as I, is in communication with the steam drum Ithrough a pipe K, and the other is adapted tvo the-'service-pipe or other steam conduit leading to the steam-utilizing apparatus, by means of a pi e L. The steamon entering the header I divides and passes through the tubes G tothe vrear of the apparatus, ,then forward'to the header H, from which it is delivered to thepoint of utilization, as described. During its passage throu h the tubes G the steam is subjected to the catedV roducts of combustion coming. from the fiirnace E and-is thoroughly superheated.

- For the purpose of effectively utilizingY the heat of the furnace gases I have devised the following novel system of baiiles. Above the Water tubes and superheater-.I place a horizontal baffle plate M, extending from the rear water leg toward the front, butleaving a passage next to -theforward header. Across lool the superheateris a vertical baflie late N,

preferably centrally. located. The tal upper baiiie is. arched transversely over the superheatenas shown infFig.; 2, or otherwise arranged so that part 'of the furnace gases, striklng the u per bale M, may pass over the vertlcal ba e N, leaving the rest to go under the latter.- Passing from the baffie M, the gases are delivered lto the stack O.

The superheate'r is held in' place by. suspending it from bars P, resting on the steam rdrum and supports Q on the boiler casing, by

Aindicated by the'dotted lines in Fig. '1,' and carry on their lower ends cross bars or plates S, on which vthe lower tubes rest. The top baille M and the top of the boiler casing are usually composed of loose brick or tiles laid in position. By removing those directly over the superheater and detaching the connections of the superheater the latter may be lifted out of its place without disturbing any ofthe other parts of the lant. /Instead of the loose tiles or bricks thev aille may have a single removable section -over the superheater, or any other suitable arrangement for readily opening `ajway for the removal of the superheater may be used. Likewise the top of the boiler casing. over the lsuperheater may bea single piece. y

My invention will be'foundfto possess a number'of important advantages. In the first lace it is vlocated in a osition which inter eres 1n no wayfwith the ree passage of gases-through the water tubes, while at the same time'itreceives itslshare of heat. lts position to the side of the steam drum, withno water tubes above it, gives a clear passage for its removal 'as a unit by merely disconnecting it, and removing sections of the top of the boiler casing and the up er baille.

VThe combinationof baille plates, orizontal and vertical,- is also. important, and gives very satisfactory results. As shown by the arrows in Fig. 1, the course of the furnace gasesis such as to bring them into contact shown herein.

with all parts of. the superheater without sacrificing their free sweep through thewater tubes. l

While l'have shown and described s eciiic- *ally only one form of the app'aratus, it 1s to be F lunderstood that the invention may be embodied in a variety ofother forms. lt will of course be obvious that the su perheater may be duplicated on the other side 0f the boiler. Likewise there might be two These, however, are very' obvious variations and need not be What l claim is: l-1. The combination with ar water tube boiler comprising a' steam drum, waterlegs depending therefrom and water tubes' extending between the water legs, of a superremovable suspens1on rods carryin heater between the water legs as substanfl 'tially the vlevel of the upper strata of water tubes in place of a part of said water tubes,

and means for removably supporting the superheater' in the osition described and prermitting removal o the superheater bodily om the setting, as set fort 2. The combination of'a steam drum water legs depending therefrom, alurality 'of water tubes extending between t e water legs, a baille plate arranged under the water tubes and open at therearfor the passage of furnace gases, a superheater located ,between the water legs to one side of the steamdrurn and -substantially level with the upper strata of water tubes, a baffle plate over the water tubes and superheater and open atthe front,

sol

and a vertical baille plate locatedt across the superheater, as set forth.

3. The combination with a steam drum,4

water legs depending therefrom, and a series of water tubes extendingbetween the latter,

of asuperheater 'arranged between the water llegs at an upper corner of the series of water tubes 1n place of a part of lsaid tubes, and removable bodily from such position, as set forth.

4.- The combination of a steam drum, water legs depending therefrom, a plurality of water tubes extending between the water legs,

a superheater between the water tubes to one side of the steam drum and substantially at the level of the upper strata of'water tubes,

perheater, inlet and outlet pi es fort e super# heater, and a removable ba e late arranged horizontally .above the super` eater, as set forth.-

5. The combination of a steam drum, Water legs depending therefrom,y water tubes extending between the water legs, a superheater between the water 'legs at"substan tially the level of the upper strata of water tubes and removable vertically from the setting, inlet and outlet pipes for the superheater, a removable baille plate arranged above the superheater and spaced therefrom and extending horizontally over the'water tubes, and a vertical .baille plate across the superheater and spaced from the said horizontal bai'lleplate, as set forth. p

l v- ERNESTH. FOSTER.

Witnesses: I y' IM. LAwsoN DYER, S. S. DUNHAM.-

the su-. 

